Flaring and burnishing tool



July 26, 1966 A, SAMUELS ETAL 3,262,297

FLARING AND BURNISHING TOOL Filed Feb. 4, 1964 7 ,fzzu 622250115 flramMszmueis' Kzgegge 5 $@P0 v M a z United States Patent This inventionrelates to improvements in a flaring and burnishing tool.

One of the objects of this invention is to provide a flaring andburnishin-g tool which is highly efficient in operation and economicalto produce.

Another object of this invention is to provide a tool which will performthe flaring operation on the forward axial and rotative movement of thecone and will automatically maintain the cone in engagement with theflared tube end during the return or rearward axial and rotativemovement of the cone to perform the burnishing operation.

Another object of this invention is to provide a tool of the foregoingcharacter utilizing yielding means between the tube flaring member andthe rotatable shaft and in which the stop means for limiting the inwardaxial movement of the stem of the tube flaring member is located insidethe shaft at a point considerably removed from the entrance to the shaftand in which the thrust of the stem in the flaring operation is againstthe inside wall of the shaft.

Other objects will become apparent as th s description progresses.

In the drawings:

FIG. 1 is an elevational view, partly in section, of the tool of thisinvention, with the end of the tube clamped in position for flaring.

FIG. 2 is an enlarged longitudinal sectional view with the tool inflaring position.

FIG. 3 is a view similar to FIG. 2 but with the tool in burnishingposition.

FIG. 4 is an enlarged sectional View taken on lines 4-4 of FIG. 2, and

FIG. 5 is an enlarged longitudinal sectional view of a modified tool inflaring position.

The embodiment shown in FIGS. 1 to 4 inclusive will now be described.

The tool includes a frame member generally indicated at which is ofgenerally C-shaped con-figuration in side elevation, having a topportion 12 with a connected rear side portion 13 and a bottom 14 havingspaced legs as which form the supports. The top 12 has a centralinternally threaded bore 16 to accommodate an externally threaded shaft18. The shaft 18 has a handle 2h rigidly aflixed to it at its upper endso that the shaft may be manually rotated by said handle and therebymove the shaft axially in bore 16, for the purpose to be more fullyexplained.

The lower end of shaft 18 has a hollow portion or bore 21 providing aninner end wall 22 and an inner annular side wall 24. The inner end wall22 serves as the stop means to be engaged by the stop engaging member ofthe tube flaring member, to be described.

The tube flaring member generally indicated at 26 is provided with acone-shaped member 28 and a stem 30 integrally formed therewith orfixedly secured thereto. The stem 30 is centrally positioned withrespect to the cone and the stem is received in the bore 21 of the shaft18. The stem 30 is formed of two diameters. One portion 3 1 of the stem30 has a sliding fit engagement with the inner lower end of the wall 24of the shaft 18, while the upper annular end 32 of the stem is ofreduced diameter, providing a shoulder 34 therebetween. The reduced end3'2 of the stem 3% has an end wall 35 which is the ice stop engagingmeans and is adapted to engage the inner end wall 22 of the shaft 18 tolimit the inward or retracted movement of the tube flaring member. Thestem portion 31 has a transversely extending pin 38 fixedly securedthereto which extends laterally of the stem in opposite directions andis received in alined and spaced enlarged openings or slots 40 in theshaft 18. The flaring member 26 isthus coupled to the shaft 18 to berotated thereby. The openings or slots 40 permit a relative axialmovement between the cross-pin 3 8 and slots 40 and this permits therelative axial movement between the flaring member 26 and the shaft 18.

A coiled compression spring 42 surrounds the reduced stem portion 32,with one end of the spring res-ting against the shoulder '34 and theother against the inner end wall 22 to normally urge the flaring member26 in a direction outwardly of the bore of the shaft. When the tool isused in the flaring operation, as shown in FIG. 2, the flaring memberwill be urged inwardly and its inward axial movement will be arrestedwhen the end 36 of the stem engages the inner end wall 22 of the bore.When this occurs, the inner horizontal surface 29 of the cone member 28is spaced from the adjacent end :19 of the shaft 18. With thisarrangement the thrust of the stem in the flaring operation is againstthe inner end wall 22 of the shaft.

The tube T to be flared and burnished is placed in a conventionalclam-ping means or split type clamping block generally indicated at 44,having the usual tapered surface 4 6. The tube clamping means and tubeare supported in the frame vlltl, as shown in FIG. '1, with the clampingmeans resting on the spaced legs 15 and the tube T extending downwardlybetween the legs. The shaft 1 8 is rotated by the handle 20 for movingthe shaft axially with respect to the frame 1d. The clockwise rotationof the shaft 18 will cause the cone-shaped head 28 to engage the end ofthe tube T and the flaring member will move inwardly, compressing thespring 42 until the end 36 of the stem engages the inner end wall 22,which limits the inward movement of the flaring tool and causes theflaring cone to flare the tube, as shown in FIG, 2. In this position thetransverse pin 38 is at the upper end of the slots 40. Upon the reverseof counterclockwise rotation of the shaft 18 through the rotation of thehandle 20, the shaft '18 will move axially away from the tube T, yet thespring 42 will expand and push against the stem 30, causing thetransverse pin 38 to move downwardly in the slots 40 and thereby urgethe cone or head 28 to remain in contact with the flared tube T andburnish the flared tube until the shaft 18 has been rotatedcounterclockwise sufliciently to withdraw the cone 28 from its contactwith the flared tube. Thus, with the initial reverse of withdrawalrotation of the shaft 18 the cone member 28 remains in contact with theflared tube to effect the burnishing operation.

The modified construction of the flaring tool shown in FIG. 5 will nowbe described.

The externally threaded shaft 18 is supported in the same frame member'10, previously described, and is rotated with respect to the frame by ahandle 20'. The threaded shaft 18' is provided at its lower end with ahollow portion or bore 46 having an inner end wall 48. The bore 46communicates with a centrally positioned reduced bore 50.

The flaring member generally indicated at 52 has a cone 54. and a stem56 extending upwardly thereof. The stem 56 has a lower portion 58, anintermediate portion 60 of reduced diameter, and an end portion 62 of afurther reduced diameter. A shoulder 64 is provided between the stemportions 58 and 60 and a shoulder 66 is provided between the stemportions 60 and 62. The lower portion 58 of the stem has a transverselyextending slot 68 which accommodates a. transverse pin 70 fixedlysecured to the shaft 18 for coupling the flaring mem- $9 I bet to theshaft while permitting axial movement therebetween. The end 62 of thestem is supported in the reduced bore 50.

A coiled compression spring 72 is positioned inside the bore around thestem portion 60, with one end of the spring resting against the shoulder64 and the other end against the end wall 48. The stem portion 58 has asliding fit with the lower end of the annular wall of the bore. Also,the reduced stem portion 62 has a sliding fit with the inner wall of thereduced bore section 50 to provide an additional guiding surface betweenthe stern and the shaft. If desired, the reduced bore 50 and the reducedstem portion 62 of the stem may be of rectangular or square-shape topermit a sliding axial movement, but no rotative movement, therebetween.

The inward movement of the stem 56 is arrested when the shoulder 66 ofthe stem engages the inner end wall 48 of the shaft 18'. The end wall 48forms the stop means and the shoulder 66 is the stop engaging means.When these parts are engaged, as shown in FIG. 5, the inner horizontalsurface 74 of the cone member 54 is spaced from the adjacent end 76 ofthe shaft 18'. The operation of the FIG. embodiment is similar to thatpreviously described.

In place of the compression spring 42 in FIGS. 1 to 4, and thecompression spring 72 in FIG. 5, any other type of resilient means maybe employed. For example, a rubber or like resilient member may besubstituted for the spring and placed around the respective stems in thesame positions as the springs to accomplish the same purpose.

It will be understood that various changes and modifications may be madefrom the foregoing without departing from the spirit and scope of theappended claims.

What is claimed is:

1. A tube flaring and'burnishing tool comprising a frame member having athreaded bore through one portion thereof and a support portion adaptedto have a tube end supported therein in alinement with said threadedbore, an externally threaded shaft engaged in said threaded bore forrotative and axial movement relative to said frame, said shaft having abore at the lower end thereof, said bore having stop means inside saidbore at a point removed from the entrance to said bore, tube flaringmeans including a cone and a stem with the stem supported in said shaftbore, said stem having means at its upper end within said bore forengaging said stop means to limit the inward axial movement of said tubeflaring means, spring means around said stem and engaging said stem andsaid stop means for normally urging said tube flaring member axiallyoutward, a handle for rotating said shaft and said flaring means ineither direction to advance or retract said shaft, means between saidshaft and said tube flaring means for coupling same to permit axialmovement between the flaring means and said shaft and rotative movementwith said shaft, said stop means being engaged by said upper end of saidstem after said flaring means has been advanced so that the cone engagesa tube for flaring operation, said spring means forcefully maintainingsaid cone urged against a tube to effect a A} burnishing thereof duringretracting rotation of said shaft until said cone disenga'gcs from thetube.

2. A structure defined in claim 1 in which the coupling means includes apin member movable with respect to a slot member, with one of saidmembers on the shaft and the other on the stem.

3. A structure defined in claim 1 in which the coupling means includes atransverse pin secured to the stern and a slot in the shaft engageableby said pin.

4. A structure defined in claim 3 in which the slot and pin are adjacentthe cone.

5. A structure defined in claim 1 in which the stem has a shoulderagainst which rests one end of the spring means, with the shoulder beingadjacent the upper end of the stem.

6. A structure defined in claim 1 in which the stem has a reduceddiameter portion at its upper end movable within a reduced diameter borein the shaft.

7. A structure defined in claim 1 in which the spring means is aresilient member.

8.'A tube flaring and burnishing tool comprising a frame member having athreaded bore through one portion thereof and a support portion adaptedto have a tube end supported therein in alinement with said threadedbore, an externally threaded shaft engaged in said threaded bore forrotative and axial movement relative to said frame, said shaft having abore at the lower end thereof and said bore having stop means insidesaid bore at a point removed from the entrance to said bore, tubeflaring means including a cone and a stem with the stem supported insaid shaft bore, said stem having means at its upper end within saidbore for engaging said stop means to limit the inward axial movement ofsaid tube flaring means, resilient means around said stem and engagingsaid stem and said stop means for normally urging said tube flaringmember axially outward, a handle for rotating said shaft and saidflaring means in either direction to advance or retract said shaft,means between said shaft and said tube flaring means for coupling sameto permit axial movement between the flaring means and said shaft androtative movement with said shaft, said resilient means being compressedand the upper end of said stem engaging said stop means when said coneis in tube flaring operation, and said resilient member being extendedand said upper end of said stem disengaged from said stop means whensaid cone is in burnishing operation, said flaring operation beingperformed .when said shaft is rotated to advance the shaft and saidburnishing operation being performed when said shaft is rotated toretract said shaft.

References Cited by the Examiner UNITED STATES PATENTS 12,737,225 3/1956Jasinski 72117 2,893,463 7/1959 Kowal 72-117 2,893,464 7/1959 Franck72117 3,050,103 8/1962 Janik 72-117 CHARLES W. LANHAM, Primary Examiner.

R. I. HERBST, Assistant Examiner.

1. A TUBE FLARING AND BURNISHING TOOL COMPRISING A FRAME MEMBER HAVING ATHREADED BORE THROUGH ONE PORTION THEREOF AND A SUPPORT PORTION ADAPTEDTO HAVE A TUBE END SUPPORTED THEREIN IN ALINEMENT WITH SAID THREADEDBORE, AN EXTERNALLY THREADED SHAFT ENGAGED IN SAID THREADED BORE FORROTATIVE AND AXIAL MOVEMENT RELATIVE TO SAID FRAME, SAID SHAFT HAVING ABORE AT THE LOWER END THEREOF, SAID BORE HAVING STOP MEANS INSIDE SAIDBORE AT A POINT REMOVED FROM THE ENTRANCE TO SAID BORE, TUBE FLARINGMEANS INCLUDING A CONE AND A STEM WITH THE STEM SUPPORTED IN SAID SHAFTBORE, SAID STEM HAVING MEANS AT ITS UPPER END WITHIN SAID BORE FORENGAGING SAID STOP MEANS TO LIMIT THE INWARD AXIAL MOVEMENT OF SAID TUBEFLARING MEANS, SPRING MEANS AROUND SAID STEM AND ENGAGING SAID STEM ANDSAID STOP MEANS FOR NORMALLY URGING SAID TUBE FLARING MEMBER AXIALLYOUTWARD, A HANDLE FOR ROTATING SAID SHAFT AND SAID FLARING MEANS INEITHER DIRECTION TO